Update cheatsheets

mail

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mail
+
+> The command operates on the user's mailbox if no argument is given.
+> To send an email the message body is built from `stdin`.
+> More information: <https://manned.org/mail>.
+
+- Send a typed email message. The command-line below continues after pressing Enter key. Input CC email-id (optional) press Enter key. Input message text (can be multiline). Press Ctrl-D key to complete the message text:
+
+`mail --subject="{{subject line}}" {{to_user@example.com}}`
+
+- Send an email that contains file content:
+
+`mail --subject="{{$HOSTNAME filename.txt}}" {{to_user@example.com}} < {{path/to/filename.txt}}`
+
+- Send a `tar.gz` file as an attachment:
+
+`tar cvzf - {{path/to/directory1 path/to/directory2}} | uuencode {{data.tar.gz}} | mail --subject="{{subject_line}}" {{to_user@example.com}}`